I finally decided to try uninstalling. There was no entry for SpeedyFox in Add or Remove Programs or any of my several uninstaller programs.
I looked at http://www.crystalidea.com/forum/viewtopic.php?f=9&t=89. I decided therefore to delete the Speedyfox icons from my desktop. I downloaded the latest version. But no new icons have appeared. So how am I supposed to use SpeedyFox?

Most programs get rid of the outdated version when the user updates, not requiring the user to uninstall the old version himself. Could you please make SpeedyFox work that way?